Image sensor and electronic apparatus including the image sensor

Abstract

An image sensor including: a sensor substrate including a plurality of pixels, wherein the plurality of pixels includes a first pixel and a fourth pixel configured to detect green light, a second pixel configured to detect blue light, and a third pixel configured to detect red light, and wherein each pixel of the plurality of pixels includes an inorganic photoelectric conversion material; a color separation lens array apart from the sensor substrate in a first direction, wherein the color separation lens array is configured to separate incident light according to wavelengths, and to condense the separated incident light onto the plurality of pixels; an organic photoelectric conversion layer between the sensor substrate and the color separation lens array; and a spectroscopic filter layer between the organic photoelectric conversion layer and the color separation lens array.

What is claimed is: 
     
         1 . An image sensor comprising:
 a sensor substrate comprising a plurality of pixels, wherein the plurality of pixels comprises a first pixel and a fourth pixel configured to detect green light, a second pixel configured to detect blue light, and a third pixel configured to detect red light, and wherein each pixel of the plurality of pixels comprises an inorganic photoelectric conversion material;   a color separation lens array apart from the sensor substrate in a first direction, wherein the color separation lens array is configured to separate incident light according to wavelengths, and to condense the separated incident light onto the plurality of pixels;   an organic photoelectric conversion layer between the sensor substrate and the color separation lens array; and   a spectroscopic filter layer between the organic photoelectric conversion layer and the color separation lens array.   
     
     
         2 . The image sensor of  claim 1 , wherein the organic photoelectric conversion layer comprises a material configured to absorb a photon to generate an exciton. 
     
     
         3 . The image sensor of  claim 1 , wherein the organic photoelectric conversion layer comprises at least one from among polyacene, rylene, rubrene, and biradicaloid. 
     
     
         4 . The image sensor of  claim 1 , wherein the organic photoelectric conversion layer has a thickness of 100 nanometers (nm) or less. 
     
     
         5 . The image sensor of  claim 1 , further comprising an interlayer between the sensor substrate and the organic photoelectric conversion layer. 
     
     
         6 . The image sensor of  claim 1 , wherein the plurality of pixels are included in a unit pixel group from among a plurality of unit pixel groups included in the sensor substrate, and
 wherein the organic photoelectric conversion layer comprises a single layer facing the plurality of unit pixel groups.   
     
     
         7 . The image sensor of  claim 1 , wherein the organic photoelectric conversion layer comprises a plurality of cells facing the plurality of pixels. 
     
     
         8 . The image sensor of  claim 7 , wherein each cell of the plurality of cells comprises an organic photoelectric material having a thickness corresponding to a color of a pixel facing the each cell. 
     
     
         9 . The image sensor of  claim 7 , wherein each cell of the plurality of cells comprises an organic photoelectric material having a material corresponding to a color of a pixel facing the each cell. 
     
     
         10 . The image sensor of  claim 7 , wherein the plurality of cells comprises a first cell facing the first pixel, a second cell facing the second pixel, a third cell facing the third pixel, and a fourth cell facing the fourth pixel,
 wherein each of the first cell, the third cell, and the fourth cell comprises an organic photoelectric material, and   wherein the second cell is a dummy cell that does not include the organic photoelectric material.   
     
     
         11 . The image sensor of  claim 7 , wherein the plurality of pixels comprises a plurality of first pixels corresponding to different chief ray angles,
 wherein the plurality of first pixels comprises a first first pixel corresponding to a first chief ray angle, and a second first pixel corresponding to a second chief ray angle,   wherein the first chief ray angle is greater than the second chief ray angle, and   wherein a thickness of an organic photoelectric material included in a first cell facing the first first pixel is less than a thickness of the organic photoelectric material included in a second cell facing the second first pixel.   
     
     
         12 . The image sensor of  claim 1 , wherein the spectroscopic filter layer comprises a plurality of spectroscopic filters facing the plurality of pixels, and
 wherein each spectroscopic filter of the plurality of spectroscopic filters has a transmission spectrum corresponding to a color of a pixel facing the each spectroscopic filter.   
     
     
         13 . The image sensor of  claim 12 , wherein a first spectroscopic filter from among the plurality of spectroscopic filters comprises two first spectroscopic filters having different chief ray angle positions and different structures from each other. 
     
     
         14 . The image sensor of  claim 12 , wherein each pixel of the plurality of pixels comprises a plurality of light detection cells, and
 wherein a size of the each spectroscopic filter is equal to a size of a light detection cell facing the each spectroscopic filter from among the plurality of light detection cells.   
     
     
         15 . The image sensor of  claim 12 , wherein the plurality of spectroscopic filters comprise a Fabry-Perot resonator. 
     
     
         16 . The image sensor of  claim 15 , wherein the each spectroscopic filter comprises a resonator having a thickness corresponding to the color of the pixel facing the each spectroscopic filter. 
     
     
         17 . The image sensor of  claim 12 , wherein the each spectroscopic filter comprises a plurality of nanostructures. 
     
     
         18 . The image sensor of  claim 17 , wherein a size of the plurality of nanostructures included in the each spectroscopic filter corresponds to the color of the pixel facing the each spectroscopic filter. 
     
     
         19 . The image sensor of  claim 1 ,
 wherein the sensor substrate comprises:
 a first pixel group comprising a plurality of first pixels arranged adjacently and continuously; 
 a second pixel group comprising a plurality of second pixels arranged adjacently and continuously; 
 a third pixel group comprising a plurality of third pixels arranged adjacently and continuously; and 
 a fourth pixel group comprising a plurality of fourth pixels arranged adjacently and continuously, 
   wherein the spectroscopic filter layer comprises:
 a first spectroscopic filter facing one of the plurality of first pixels included in the first pixel group; 
 a second spectroscopic filter facing one of the plurality of second pixels included in the second pixel group; 
 a third spectroscopic filter facing one of the plurality of third pixels included in the third pixel group; and 
 a fourth spectroscopic filter facing one of the plurality of fourth pixels included in the fourth pixel group. 
   
     
     
         20 . An electronic apparatus comprising:
 a lens assembly comprising at least one lens and configured to form an optical image of an object;   an image sensor configured to convert the optical image into an electronic signal; and   a processor configured to process the electronic signal,   wherein the image sensor comprises:
 a sensor substrate comprising a plurality of pixels, wherein the plurality of pixels comprises a first pixel and a fourth pixel configured to detect green light, a second pixel configured to detect blue light, and a third pixel configured to detect red light, wherein the plurality of pixels comprises an inorganic photoelectric conversion material; 
 a color separation lens array apart from the sensor substrate in a first direction, wherein the color separation lens array is configured to separate incident light according to wavelengths and to condense the separated incident light onto the plurality of pixels; 
 an organic photoelectric conversion layer between the sensor substrate and the color separation lens array; and 
 a spectroscopic filter layer between the organic photoelectric conversion layer and the color separation lens array.